/*
 * 
 * 
 * 
 */
package com.cms.template.directive;

import com.cms.entity.Nav;
import com.cms.entity.Site;
import com.cms.service.NavService;
import com.cms.utils.FreeMarkerUtils;
import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.util.Map;

/**
 * 模板指令 - 单个导航
 *
 * 
 * 
 */
@Component
public class NavDirective extends BaseDirective {

	@Autowired
	private NavService navService;
	
	/** "ID"参数名称 */
	private static final String ID_PARAMETER_NAME = "id";

	/** 变量名称 */
	private static final String VARIABLE_NAME = "nav";

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body) throws TemplateException, IOException {
		Site currentSite = getCurrentSite();
		Integer siteId = currentSite.getId();
		Integer id = FreeMarkerUtils.getParameter(ID_PARAMETER_NAME, Integer.class, params);
		Nav nav = navService.getById(id);
		setLocalVariable(VARIABLE_NAME, nav, env, body);
	}
}